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ABSTRACT
Numerous collections of the orange-colored Pocheina have been obtained in North Carolina and other areas of the United States, and in Australia and England. All but one were found on bark of live gymnosperm and frondose trees. A single collection from a dead Juniperus virginiana tree most closely resembles the type collection of P. rosea. Further studies may reveal that the majority of our collections of P. rosea represent a new variety. The new species, P. flagellata, found on the bark of live gymnosperm trees in Wisconsin and North Carolina, has sorocarps that resemble those of our common P. rosea collections but differs in having flagellate cells, spores with more abundant punctations, and nuclei that, during mitosis, lack divided nucleolar parts at the polar areas, which are present in the mitotic nuclei of P. rosea. Pocheina and Acrasis are considered related genera that are unrelated to other acrasid cellular slime molds.